docs: add release notes for v0.40.1

docs/release-notes/ck8s.md

@@ -6,6 +6,7 @@
 
 <!-- BEGIN TOC -->
 
+- [v0.40.1](#v0401) - 2024-09-18
 - [v0.40.0](#v0400) - 2024-08-21
 - [v0.39.2](#v0392) - 2024-09-04
 - [v0.39.1](#v0391) - 2024-07-15
@@ -54,6 +55,26 @@
 
     For a more detailed look check out the full [changelog](https://github.com/elastisys/compliantkubernetes-apps/tree/main/changelog).
 
+## v0.40.1
+
+Released 2024-09-18
+
+!!! danger "Security Notice(s)"
+
+    - This patch release mitigates the following high and medium severity vulnerabilities:
+        - Ingress-NGINX [CVE-2024-7646](https://github.com/kubernetes/kubernetes/issues/126744)
+        - Grafana [CVE-2024-6837](https://grafana.com/blog/2024/08/14/grafana-security-release-medium-severity-security-fix-for-cve-2024-6837/)
+
+### Improvement(s)
+
+- Ingress-NGINX was upgraded to v1.11.2 and NGINX itself to v1.25.5.
+- Grafana was upgraded to v10.4.7.
+
+### Other(s)
+
+- Fix for install-requirements script.
+- Fixed a broken cluster status dashboard.
+
 ## v0.40.0
 
 Released 2024-08-21